ρw	apparent density of water in the material (kg m−3)
ρm	apparent density of solid material (kg m−3)
vw	absolute velocity of water flow within the porous medium (m s−1)
vm	absolute velocity of solid medium (m s−1)
W	water content (kg water/kg dry matter) in the solid matrix
W 1	water content at the starting diffusion time
W 0	value of moisture content calculated from diffusion model extrapolated to t = 0 (% db)
W ∞	equilibrium water content at a very long time t → ∞ (kg water/kg dry matter)
Wi	initial water content (kg water/kg dry matter)
Deff	effective diffusivity of water within the solid medium (m2 s−1) for dehydration or rehydration
Dapp	apparent drying coefficient (m2 s−1)
dp	thickness (m)
k	slope of y = Ln (Moisture Ratio) as a function of time (s−1)
δWs	starting accessibility of water (kg water/kg dry matter) for dehydration d or rehydration r
τ	Fick’s number
Ai, qi	Crank’s coefficients according to the geometry of solid matrix